shell脚本判断主机是否存活

函数调用

#!/bin/bash
ip_access_status() {
        if ping -c 1 $IP >/dev/null
        then
                echo $IP ok
                continue
        fi
}

IP=(192.168.124.22 192.168.124.71 192.168.124.23)
for IP in ${IP[@]}
do
        ip_access_status
        echo $IP no
done

普通循环

#!/bin/bahs
IP_LIST=(192.168.124.22 192.168.124.71 192.168.124.23)
for ip in ${IP_LIST[@]}
do
        NUM=1
        while [ $NUM -le 3 ]
        do
                if ping -c 1 $ip >/dev/null
                then
                        echo $ip ping is successful
                        break
                else
                        FALL_COUNT[$NUM]=$ip
                        let NUM++
                fi
                
        done
#${#FALL_COUNT[*] 获取数组长度       
        if [ ${#FALL_COUNT[*]} -eq 3 ]
        then
                echo "${FALL_COUNT[1]} ping is failure"
                unset FALL_COUNT[*]
        fi
done